Losing a creature a turn is a hard pill for an opponent to swallow, especially once it costs you no investment past the initial one mana and one card
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This is because the ability checks the creature as it last existed on the battlefield, and it still had those counters on it at that point
Luck-Based Mission: The Roof Of Riovanes Castle battle, where if the dice land wrong, you can get a "game over" before you even get a turn
Finally, the amount of competition for collections (at least in my area) seems to have increased in the past two years
16 Krav, The Unredeemed And Regna, The Redeemer Partner commanders, Krav, the Unredeemed and Regna, The Redeemer are a Demon and Angel respectively who can be used simultaneously